Techstars Boulder Demo Day is this week. It always marks the true end of summer for me and it’s a reminder that I stalled out on my Techstars Mentor Manifesto series of blog posts. The last one I wrote was #11: Clearly Commit To Mentor Or Do Not. Either Is Fine. It’s an important life rule – either commit or don’t commit – but choose! Mentor Manifesto #12 is also a good life rule: Know What You Don’t Know. Say I Don’t Know When You Don’t Know.